The width of the label will be adjusted automatically. You can produce
multi-line labels by putting line breaks (“\n”) in the label string.

Labels can be made selectable with Gtk.Label.set_selectable().
Selectable labels allow the user to copy the label contents to the
clipboard. Only labels that contain useful-to-copy information —
such as error messages — should be made selectable.

Gtk.Label support some simple formatting, for instance allowing you to
make some text bold, colored, or larger. You can do this by providing a string
to Gtk.Label.set_markup(), using the
Pango Markup syntax [1].
For instance, <b>boldtext</b>and<s>strikethroughtext</s>.
In addition, Gtk.Label supports clickable hyperlinks.
The markup for links is borrowed from HTML, using the a with href and title
attributes. GTK+ renders links similar to the way they appear in web browsers,
with colored, underlined text. The title attribute is displayed as a tooltip
on the link.

Labels may contain mnemonics. Mnemonics are underlined characters in the
label, used for keyboard navigation. Mnemonics are created by providing a
string with an underscore before the mnemonic character, such as “_File”,
to the functions Gtk.Label.new_with_mnemonic() or
Gtk.Label.set_text_with_mnemonic().
Mnemonics automatically activate any activatable widget the label is inside,
such as a Gtk.Button; if the label is not inside the mnemonic’s target
widget, you have to tell the label about the target using
Gtk.Label.set_mnemonic_widget().

fromgi.repositoryimportGtkclassLabelWindow(Gtk.Window):def__init__(self):Gtk.Window.__init__(self,title="Label Example")hbox=Gtk.Box(spacing=10)hbox.set_homogeneous(False)vbox_left=Gtk.Box(orientation=Gtk.Orientation.VERTICAL,spacing=10)vbox_left.set_homogeneous(False)vbox_right=Gtk.Box(orientation=Gtk.Orientation.VERTICAL,spacing=10)vbox_right.set_homogeneous(False)hbox.pack_start(vbox_left,True,True,0)hbox.pack_start(vbox_right,True,True,0)label=Gtk.Label("This is a normal label")vbox_left.pack_start(label,True,True,0)label=Gtk.Label()label.set_text("This is a left-justified label.\nWith multiple lines.")label.set_justify(Gtk.Justification.LEFT)vbox_left.pack_start(label,True,True,0)label=Gtk.Label("This is a right-justified label.\nWith multiple lines.")label.set_justify(Gtk.Justification.RIGHT)vbox_left.pack_start(label,True,True,0)label=Gtk.Label("This is an example of a line-wrapped label. It ""should not be taking up the entire ""width allocated to it, but automatically ""wraps the words to fit.\n"" It supports multiple paragraphs correctly, ""and correctly adds ""many extra spaces. ")label.set_line_wrap(True)vbox_right.pack_start(label,True,True,0)label=Gtk.Label("This is an example of a line-wrapped, filled label. ""It should be taking ""up the entire width allocated to it. ""Here is a sentence to prove ""my point. Here is another sentence. ""Here comes the sun, do de do de do.\n"" This is a new paragraph.\n"" This is another newer, longer, better ""paragraph. It is coming to an end, ""unfortunately.")label.set_line_wrap(True)label.set_justify(Gtk.Justification.FILL)vbox_right.pack_start(label,True,True,0)label=Gtk.Label()label.set_markup("Text can be <small>small</small>, <big>big</big>, ""<b>bold</b>, <i>italic</i> and even point to ""somewhere in the <a href=\"http://www.gtk.org\" ""title=\"Click to find out more\">internets</a>.")label.set_line_wrap(True)vbox_left.pack_start(label,True,True,0)label=Gtk.Label.new_with_mnemonic("_Press Alt + P to select button to the right")vbox_left.pack_start(label,True,True,0)label.set_selectable(True)button=Gtk.Button(label="Click at your own risk")label.set_mnemonic_widget(button)vbox_right.pack_start(button,True,True,0)self.add(hbox)window=LabelWindow()window.connect("delete-event",Gtk.main_quit)window.show_all()Gtk.main()